Heating apparatus.



M. B. JACKSON, THE YOUNGER & P. T. JACKSON.

HEATING APPARATUS.

APPLICATION FILED OCT. 23, 1911 Patented Apr. 14, 1914.

WITNESSES A TTOR Y.

6 ada, and

. 25 up one leg and down the other.

451m auxiliary house heating was apnnr orrio.

MAUNSELL BOWERS JACKSON, THE YOUNGrER, OF VANCOUVER, BRITISH COLUMBIA,

Ann PHILIP r. JACKSON, or YOUNGER, ASSIGNOR ro-sam TORONTO, ONTARIO, CANADA; SAID JACKSON, THE PHILIP T. JACKSON.

To all whom it mag concern Be it known that we, MAUNSELL B. JACK- soN, the younger, of the city of Vancouver, in the Province of British Columbia, Can- PHILIP T. JACKSON, of the city of Toronto, in the Province of Ontario, Canada, have invented new and useful lmproven'lents in Heating Apparatus, of which the followingis a specification. 10

his'inventionrelates to apparatus for heating air for use in heating buildings or for other purposes and particularly to apparatus especially adapted to burn a gaseous or liquid fuel, and our object is to devise a construction which, while simple and coinparatively cheap, will enable the heat value of, the fuel to be used to the greatest possible advantage.

' e attain our object by means of a (-onstruction which may be briefly described as follows 1 Within a suitable casing forn'iing a chamber is located a radiator of substantiallycan inverted U-shape, the products of combustion from the source of heat passing The chamberis divided by a wall preferably of in- .Sulating material and, located between the legs of the radiator, into two separate air 1 passages preferably though not necessarily substantially vertical. A cold air chamber is formed at the bottom of the heater and a hot air mixing chamber at the top of the heater, each communicating with .the air passages. The air entering the lower cham- 85 her is dividedinto two independent streams 'flowing up the air passages and coinmingling in the mixing chamber. It follows from thisconstruction that the products of combustion pass away from the apparatus at 40 the ,point where the temperature of the air to be heated -is lowest a condition necessary to economy of operation.

The drawings illustrate an embodiment of our invention particularly adapted for plant using gas as fuel but it will be understood, of course, that the invention without change of principle is adaptable for 'usewith any kind of fuel and for any duty involving the absorption of heat from the products of coin bustion.

F igure l is a vertical section of our improved heater. Fig. 2 is a vertical section on the line ab, Fig. 1. Fig. 3 is a plan Specification of Letters Patent. Application filed October 23, 1911.

Patented Apr. 1a, 1914i. Serial No. 656,230.

view. Fig. 4% is a section on the line rzl, Fig. 1. Fig. 5 is a perspective detail of a portion of the down draft leg of the radiator, partly broken away, showing the annular bal'lles. cation of the baliies shown in F ig.

In the drawings like letters of reference indicate corresponding parts in the different gures.

A is the casing of the heater within which is located a radiator of substantial inverted Ushape, comprising a leg forming the up draft flue l3 and a leg forming the down draftl'lue C connected at the top by the cross line D. The casing is divided by the wall E into two vertical independent air passages G and Il. respectively surrounding the two legs of the radiator.

At the bottom of the casing is formed the cold air chamber F eoum'iunicating with the lower ends of the air passages G and H. lVith this chamber (JOI'l'lIllllIllCzltGS the cold air pipe I. At the upper end of the casing is formed the mixing chamber J into which the air passages G and H open.

In the lower end of the up draft. flue located a suitable heating device, preferably a fluid burner K, adapted to burn gaseous or liquid fuel. With the lower 'end of the down draft flue (J is connected the smoke exit pipe L. k

The down draft flue (l in order to obtain increased heating surface is preferably an nular in shape, being provided with an inner tube M opened at the top and bottom to form a third air passage.

The l wer end of the annular down draft flue (l is formed as a drip trough r'. to catch water of condensation which may collect in the flue. A pipe 1) leads from this drip trough to a water pan N loralcd in the chamber F preferably adjacent the burner K.

To obtain a large healing service the flue B is made SOlllQWl'lfLl; larger than is necessary for the passage of the products of coinbustion and a series of bodies and (Z are placed therein preferably alternately circa-- lar and annular, insuring that the stream lines of the products of combustion will be thoroughly broken up and all parts of the gases brought in contact with the sides of the flue.

To increase the heating effect of the annular fine 0 we prefer to place therein a series Fig. 6 is a detail of a modifi opening at the lower. end of the up as follows: The gaseous of annular metal gratings or baifles e which may be of any suitable construction, but are preferably formed of annular troughs of wire netting pressed up into Shape and forced down between the wallsof the flue to their places. Spacers f secured to each grating or baflle and resting on the next lower baflie serve to accurately position these baffles. (See Fig. 5.) 1

As an alternative the baffles 6' may be made of sheet metal having a series of tongues f stamped'therein and bent'down at an angle the baflles also being stamped up at, each edge to form rings g to engage the walls of the flue. (See Fig. 6.)

To prevent damage due to explosion occurring within the heater we provide relief doors 0 wherever they may be needed. These are hinged by theirupper edges so as to swing vertically and are preferably inclined so that the action of mally and yieldingly holds t em closed. We show two doors arranged one at each end of the cross flue D and closin suitable openings therein, a similar door 0 osing an flue B access to the burner and serving also to give lower end of the smoke asimilar door at the 'exit pipe L.

- The mode of operation of the heater is 7 products of combustion from the burner which usually include'water vapor pass throu h the B losing heat through the wall the top of the flue. the temperature of the flue gases is still too high for condensation to take place, so that no condensation takes place above the burner. The-gases then pass p to the cross flue D and down the annular down draft flue C'givin column on the outside 0 the outer tube and the air column on the inside of the inner tube, part of theirheat' being. taken'up by the gratings and conducted, to the walls of the flue to be'takenup in turn by the mov-. ing streams of air. The temperature of the. flue gases in the down draft flue is sufficiently reduced to allow condensation of the water vapor to take place. The water of condensation runs down into the drip trough a thence assing to the water pan N through the p The water in the pan is evapof rated nto and carried up by the air passing through the heater. 'The water pan 1S preferablymade to slide on suitable guides such as the flanges g formedot the lower end of the flue B so that by ad'usting its distance from thesource of heat t e amount of evaporation can be controlled. If the condensation does not provide sufficient water to moisten the heated air water from some other source can easily be introduced into the pan. It will be seen that the air to be heated enters at the bottom of the heater to form the necessary openings, I

ravity nor- 7 up flue sthereo At up heat to the air through the chamber F and divides into three'columns, one passing up around the u draft flue B, one up outside the down dra t flue C and the other'up through the central tube of the down draft flue C. The column of air passing up around the up strikes the walls of the latter at the hottest point in the heater and passesupward in the same direction as the flue gases, the transfer of heat from the gases to the flue taking place at .the maximum difference of. temperature. The other columns of air come in contact with the down draft flue C at a point where the gases leave itand escape to the chimney, the-air then traveling upward in the opposite direction to the gases in the flue. It will be seen thatthe gases leave the heater at the point of lowest temperature, and therefore carry oflthe smallest possible amount of heat. The columns of heated air join in the mixing chamber J and pass out through the pi e P.- .The lower end of the up-draft flue g opens directly into the cold air chamber F so that the air for combustion is drawn from the cold air supply and not from the roomin which the heater is located. This arrange ment prevents the dust from the room entering the heater and also utilizes the downwardly radiated heat which is taken up by the air passing ber insteadof being wasted.

through the cold air cham- I We consider it of greatimportance to maintain complete separation between the.

airpassmg up in contact with the up draft flue and the air passing up in contact with I the down draft flue, since the'greatest elliciency is obtained by having the greatest ossib'le difl'erenceof it comes in contact and by arranging the ap-' paratus so that the temperature of the flue gases at their point of exit will be as low as possible compatible with. sufficient draft. The wall E is, therefore, preferably made of some heat insulating material to reventthe transfer othefit from one side 0 the heater to the other.

What we claim as our invention is 1. In a heater the combination of a cas ing; a radiator provided with a' long updraft and a long down-draft flue connected at'the top by a short transverse flue a wall 4 diViding the casin into two separated, unobstructed up-dra t air passages in one of which is located'the up-draft flue and in the other the down-draft flue; a cold air chamber at-the bottom of -the" heater common to .both air passages; anda mixing chamber at the top.of the heater in which sard transverse flue is located and into which said separate air passages discharge.

temperature between the air to be heated and the walls with which QQIn a heater the combination of a casa radiator provided witha long l p-1 and a long down d'raft flue'bonn'ected draft .structed up-draft which is located the lipat the top by a snort'transverse flue; a wall dividing the casing into separated, unobair assag'es in one of raft flue and in the other the down-draft flue; a cold chamber at the bottom of the heater common to both air passages; and a mixing chamber at the top of the heaterin which said transverse flue is located and into which said separate air passages discharge; aburner located' at the lower endof the up-draft flue; and baflles located in both the lip-draft and down-draftfines.v

3. In a heater the combination of a casing; a radiator provided with a long updraft and along at the top by a short transverse flue; a wall dividing the casin into two separated, unobstructed up-dra t airpassages in one of which is located the up-draft flue and in the other the down-draft flue; a cold air chamber at the bottom of the heater common to both air passages; a mixing chamber at the top of the heater in which said transverse flue is located and into which said separate air passages discharge; and a smoke exit flue connected with the down-draft flue and extending through thecold air chamber to the outside of the apparatus.

4. In a heater the combination of a radiator provided with an up-draft and a downdraft flue; separate air passages surrounding said flues; means fdr admitting air at the bottom of each passage; a mixingchamber at the top of the heater into which said separate air passages discharge; afluid burner in the lower end of the up-draft flue; a smoke exit pipe'connected with the downdraft flue near its lower end; a dri trough at the lower end of the down-draft flue; a water pan-outside the lower end of the up draft flue; and a pipe leading'from the drip trough to the water pan.

I 5. In a heater the combination of an updraft flue; a down-draft flue; a dri a trough at the lower end of the down-dr'a t flue; a water pan outside the lower end of the updraft flue; and a trough to the water pan.

6. In a heater the combination of a burner adapted to use a fluid fuel, an up-flue and a down-flue for the passage of the products of combustion; air passages about said flues; means for collecting water of condensation in said flues located at the bottom of the down-flue; means for evaporating the water of condensation to moisten the air passing through said passages and a conduit leading from the'collecting means to the evaporating means.

7. In a heater the combination of a burner adapted to use fluid fuel; flues for the passage of the products of combustion; air passages about said flues; a water pan for collectinowater of condensation located in one down-draft flue connected ing; a radiator pipe leading from the drip Q of said flues where the temperature 15 relamunicating with both the air passages and with the lower end ofthe up-draft flue; and a mixing chamber at the top of the heater into which said separate air passages dis charge.

9. In a heater the combination of a casing; a radiator provided with an up-draft and a down-draft flue; a wall dividing the casing into'two up-draft air passages in one of which is located the up-draft flue and in the other the down-draft flue; a cold air chamber at the bottom of the heater-communicating with both the air passages and with the lower end of the up-draft flue; a mixing chamber at the top of the heater into which said separate air passages discharge; and a burner located at the lower end of the up-draft flue.

10. In a heater the combination of-a casing; a radiator provided with an up-draft and a down-draft flue; a wall di iding the easing into two air passages in one of which is located the up-draftflue and in the other the down-draft flue; a cold air chamber at the bottom of the heater communicating with both'the air passages and with thelower end of the up-draft flue; and a mixing chamber at the-top of the heater into which said separate air passages discharge and an inner tube in one of the flues forming an air passage extending from the cold air chamber to the mixing chamber.

11. In a heater the combination'of a casprovided with an up-draft and a down-draft flue; a wall dividing the casing into two air passages in one of which is located the up-draft flue and in the other the down-draft flue; a cold air chamber at the bottom of the heater communicating with both the air passages and with the lower end of the up-draft flue; a mixingchamber at the top of the heater into which said separate air passages discharge; and a burner located at the lower end of the updraft flue, the cold air chamber having its inlet adjacent the lower end of the down draft flue. m

12. In a heater the combination of-a casing; a radiator provided with an up-draftand a down-draft flue; a wall dividing the casing into two air passages in one of which is located the up-draft flue and inthe other iiio the down-draft flue; a cold air chamber atthe bottom of the heater communicating with both the air passages and with the lower end of the up-draft flue; a mixing chamber at the top of the heater into which said separate air passages discharge; a buriier located at the lower endof the updraft fine and a dgor closed passage communicating with the Lip-draft flue above the burner and extending outside of the apparatus.

9glancouver, B. C.-, this 11 day oi October, 1

MAUNSELL BOWERS JACKSON, THE YOUNGER- Signed in the presence of- G; O. WOODWARD, JpHN T. DAVIES. Toronto, Ont, this 17th day ofOch, 1911.

PHILIP T. JACKSON. Signed in the'presence of- J. EDW. MAYBEE, E. P. HALL. 

